20 questions for “File Upload Handling”

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PHP File Upload Handling 7 PHP File Handling & File System Functions 3 ASP.NET Core File Uploads & Streaming Large Files 2 Node.js File Uploads & Media Processing 2 ASP.NET Core Error Handling 1 Next.js Form Handling & Validation in Next.js 1 Node.js File System (fs) Module 1

Information Technology

20 questions in 5 technologies

#	Question	Technology	Topic	Level
1	How do you move an uploaded file from its temporary location to a permanent storage location using move_uploaded_file? PHP › File Upload Handling	PHP	File Upload Handling	Beginner
2	How should you validate an uploaded file's type and size before accepting it, and why is checking only the file extension considered insufficient for security? PHP › File Upload Handling	PHP	File Upload Handling	Intermediate
3	How does PHP handle file uploads submitted through an HTML form, and what information does the $_FILES superglobal provide? PHP › File Upload Handling	PHP	File Upload Handling	Beginner
4	How do you handle multiple file uploads submitted from a single form field, and what does the resulting $_FILES array structure look like? PHP › File Upload Handling	PHP	File Upload Handling	Intermediate
5	How should uploaded file names be sanitized and randomized to avoid security risks and naming conflicts when storing files on the server? PHP › File Upload Handling	PHP	File Upload Handling	Intermediate
6	What security risks arise from allowing file uploads into a publicly accessible directory, and how do you prevent uploaded files from being executed as scripts? PHP › File Upload Handling	PHP	File Upload Handling	Advanced
7	How should a large scale application design its file upload architecture to handle high volumes of uploads reliably, including virus scanning and offloading storage to a dedicated service? PHP › File Upload Handling	PHP	File Upload Handling	Advanced
8	What security risks are associated with file handling operations that involve user supplied file paths, and how does path traversal attack prevention work? PHP › File Handling & File System Functions	PHP	File Handling & File System Functions	Advanced
9	What HTTP status code and response should be returned when an upload fails validation (wrong type, too large, missing file)? ASP.NET Core › File Uploads & Streaming Large Files	ASP.NET Core	File Uploads & Streaming Large Files	Beginner
10	How do you validate an uploaded file's actual content type (not just its client-supplied extension or Content-Type header) to prevent malicious file uploads? ASP.NET Core › File Uploads & Streaming Large Files	ASP.NET Core	File Uploads & Streaming Large Files	Intermediate

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